Scubapro Aladin 2G User Manual

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Aladin 2G

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SAFETY CONSIDERATIONS

You must carefully read and understand this entire manual before using your Aladin 2G.

WARNING

Diving has many inherent risks. Even if you follow the instructions of this manual in a careful manner, it is still possible that you may be seriously injured or die from decompression sickness, oxygen toxicity or some other inherent risk of scuba with Nitrox or compressed air. Unless you are fully aware of these risks and are willing to personally accept and assume responsibility for those risks, do not use Aladin 2G.

Guidelines for the use of Aladin 2G

The following guidelines for using Aladin 2G are derived from the latest medical research and the recommendations of the American Academy of Underwater Sciences for diving with diving computers. Following these guidelines will greatly increase your safety while diving, but cannot guarantee that decompression sickness or oxygen toxicity will not occur.

• Aladin 2G is designed for dives with compressed air (21% O 100% O2) only. Do not use Aladin 2G for dives made with other mixed gases.

• It is absolutely necessary to check the set mixture before each dive and to compare it to the gas mixture currently used. Always remember: setting an incorrect mixture carries an inherent risk of decompression sickness and/or oxygen toxicity! Maximum deviation from the measured mixture must not exceed 1%O

. An incorrect gas mixture can be

lethal!

• Only use Aladin 2G with open circuit breathing systems.

• Only use Aladin 2G for diving with an independent breathing apparatus. Aladin 2G is not designed for long term exposures with Nitrox.

• Always observe the visual and audible alarm signals. Avoid situations of increased risk which are marked with a warning sign in this operating manual.

• Aladin 2G has a ppO

warning. The default limit is set at 1.4bar ppO2 max. It can be

changed between 1.2 and 1.6bar.

• Frequently check the “oxygen clock” (CNS O

). Ascend and finish the dive if the CNSO2

exceeds 75%.

• Never dive deeper than the Maximum Operating Depth (MOD) pertinent to the gas mixture in use.

• Always check the diving limits considering the oxygen content and standard sports diving procedures (decompression sickness, oxygen toxicity).

• In accordance with the recommended maximum diving limit of all instructional agencies, do not dive deeper than 40 metres/130 feet.

• The danger of nitrogen narcosis has to be taken into consideration. Aladin 2G gives no warning about this.

• On all dives, with or without dive computer, make a safety stop for at least 3 minutes at 5metres (15 feet).

• All divers using dive computers to plan dives and indicate or determine decompression status must use their own computer, which they take with them on all dives.

• If Aladin 2G fails at any time during the dive, the dive must be terminated, and appropriate surfacing procedures (including a slow ascent and a 3 to 5 minute safety stop at 5 metres /15 feet) should be initiated immediately.

• Comply with the ascent rate and carry out any decompression stop required. If the computer should fail for any reason, you must ascend at a rate of 10m (30ft) per minute or less.

) and Nitrox (22 to

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SCUBAPRO ALADIN 2G

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• On any given dive, both divers in a buddy pair must follow the most conservative dive computer for that particular dive.

• Never dive without a buddy. Aladin 2G does not substitute for a dive buddy.

• Only make dives that are appropriate to your level of dive training. Aladin 2G does not increase your knowledge of diving.

• Always dive with back-up instruments. Make sure that you always use back-up instrumentation including a depth gauge, submersible pressure gauge, digital bottom timer or dive watch, and have access to decompression tables whenever diving with a dive computer.

• Avoid repeated ascents and descents (yo yo diving).

• Avoid repeated heavy workload while at depth.

• Plan the dives to be shorter if they are made in cold water.

• After finishing the decompression or at the end of a no-stop dive, the final stage of the ascent should be as slow as possible.

• You MUST be familiar with all signs and symptoms of decompression sickness before using Aladin 2G! Seek IMMEDIATE treatment for decompression sickness should any of these signs or symptoms occur after a dive! There is a direct correlation between the effectiveness of treatment and the delay between the onset of symptoms and the treatment for decompression sickness.

• Only dive with Nitrox after you have been thoroughly instructed by a recognized institution.

Repetitive dives

• Do not start your next dive before your CNSO

% status has dropped below 40%.

• When diving with Nitrox, make sure your surface interval is long enough (just like diving with compressed air). Plan for a minimum surface interval of two hours. Oxygen, too, needs sufficient time to leave the body.

• Match gas mixture to the intended dive.

• Do not attempt a repetitive dive if the no-dive warning

is visible on the display.

• Plan a day without diving once a week.

• If you have to change computers, wait at least 48 hours before carrying out your next dive.

• Diving after a reset of the remaining saturation (reset, see page 62, or battery replacement, see page 68) may lead you into potentially hazardous situations which could result in death or serious injury. After a reset of the remaining saturation do not dive for at least 48 hours.

Altitude and diving

• Do not dive at altitudes higher than 4000m (13000ft).

• After a dive do not rise to altitudes that Aladin 2G prohibits via the flashing altitude range number (see page 31).

Flying after diving

• After diving, wait at least 24 hours prior to flying.

Aladin 2G dive instrument is a personal protective equipment in compliance with the essential safety requirements of the European Union directive 89/686/EEC. RINA SpA, Via Corsica 12, I-16128 Genoa, notified body no. 0474, have certified the conformity with the European Standard EN 13319:2000.

EN13319:2000 Diving accessories - Depth gauges and combined depth and time measuring devices - Functional and safety requirements, test methods. Any information on decompression obligation displayed by equipment covered by this standard is explicitly excluded from its scope.

5. 2010

SCUBAPRO ALADIN 2G

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TABLE OF CONTENTS

Guidelines for the use of Aladin 2G ......................................................................1

1. Introduction .............................................................................................................6

2. System and operation ............................................................................................9

2.1 System description ....................................................................................9

2.2 Operation ..................................................................................................9

2.2.1 Push buttons .............................................................................9

2.2.2 Water contacts .........................................................................10

2.2.3 SmartTRAK .............................................................................10

2.2.4 Switching on the display .........................................................14

2.2.5 How to navigate Aladin 2G at the surface .................................15

2.2.6 Checking the desaturation time ................................................15

2.2.7 Checking the surface interval ...................................................16

2.2.8 Displaying the date ..................................................................16

2.2.9 Checking the battery condition .................................................16

2.2.10 Active backlight ........................................................................17

2.2.11 Switching off the display ...........................................................17

2.2.12 Alarm clock ..............................................................................17

2.3 SOS mode ..............................................................................................17

3. Diving with Aladin 2G ...........................................................................................19

3.1 Terminology / Symbols ............................................................................19

3.1.1 General terminology / Display during no-stop phase ................19

3.1.2 Display during decompression phase .......................................19

3.1.3 Nitrox information (O

information) .............................................20

3.2 Attention messages and alarms ...............................................................20

3.3 Preparation for the dive ...........................................................................21

3.3.1 Setting the gas mixture and ppO2 max ............................21

3.3.2

Setting the MB level ..........................................................22

3.3.3 Preparation for diving with two gas mixtures ........................22

3.3.4 Preparation for the dive and function check..............................22

3.4 Functions during the dive ........................................................................22

3.4.1 Immersion ................................................................................ 22

3.4.2 Setting bookmarks ...................................................................23

3.4.3 Dive time .................................................................................23

3.4.4 Current depth / O

% mix ..........................................................23

3.4.5 Max depth / Temperature .........................................................23

3.4.6 Ascent rate ..............................................................................24

3.4.7 Partial pressure of oxygen (ppO

max) / Maximum Operating

Depth (MOD) ............................................................................25

3.4.8 Oxygen toxicity (CNS O2%) .......................................................26

3.4.9 Nitrogen loading bar graph .......................................................26

3.4.10 Decompression information ......................................................27

3.4.11 Safety stop timer ......................................................................29

3.5 Functions at the surface ..........................................................................29

3.5.1 End of a dive ............................................................................ 29

3.5.2 Residual nitrogen bar graph .....................................................29

3.5.3 Desaturation time, No-ﬂy time and No-dive warning .................30

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3.6 Diving in mountain lakes ..........................................................................31

3.6.1 Altimeter ..................................................................................31

3.6.2 Altitude ranges ......................................................................... 31

3.6.3 Prohibited altitude ....................................................................32

3.6.4 Decompression dives in mountain lakes ...................................32

4. Gauge mode ..........................................................................................................33

5. Apnea mode ..........................................................................................................35

5.1 Switching the Apnea mode on and off .....................................................35

5.2 Diving in Apnea mode .............................................................................36

6. Diving with microbubble (MB) levels ...................................................................37

6.1 Comparison of dives with MB level L0 and MB level L5 ...........................38

6.2 Terminology .............................................................................................38

6.2.1 Display during MB no-stop phase ............................................38

6.2.2 Display during level stop phase ................................................39

6.3 Preparation for a dive with MB levels .......................................................39

6.3.1 Setting the MB level .................................................................39

6.4 Functions during the dive with MB levels .................................................40

6.4.1 Level stop information ..............................................................40

6.4.2 Total time of ascent ..................................................................41

6.4.3 Decompression obligation ........................................................41

6.4.4 Level stop and deco stop .........................................................42

6.5 Complete a dive with MB levels ............................................................... 43

7. PDIS (Proﬁle Dependent Intermediate Stop) ......................................................44

7.1 Introduction to PDIS (Proﬁle-Dependent Intermediate Stop) .....................44

7.2 How does PDIS work? ............................................................................45

7.3 Special considerations when diving with more than one gas mixture

(Aladin 2G) ..............................................................................................46

7.4 Diving with PDIS ......................................................................................46

Diving with two gas mixtures ..........................................................................48

9. Dive planner ..........................................................................................................54

9.1 Planning a no-stop dive ...........................................................................54

9.2 Planning a decompression dive ...............................................................55

9.3 Leaving the dive planner ..........................................................................55

10. Logbook .................................................................................................................56

10.1 Survey .....................................................................................................56

10.2 Operation ................................................................................................ 56

11. Settings ..................................................................................................................58

11.1 Altitude adjustment ..................................................................................58

11.2 Menu “set 1” ...........................................................................................58

11.3 Menu “set 2” ...........................................................................................63

11.4 Menu “set 3” (Apnea) ...............................................................................66

SCUBAPRO ALADIN 2G

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12. Appendix ................................................................................................................68

12.1 Technical information ...............................................................................68

12.2 Maintenance ...........................................................................................68

12.2.1 Replacing the battery ...............................................................68

12.3 Warranty..................................................................................................70

12.4 Index .......................................................................................................71

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SCUBAPRO ALADIN 2G

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1. Introduction

1. INTRODUCTION

Congratulations on purchasing Aladin 2G and welcome to SCUBAPRO. From now on you will enjoy the assistance of the most extraordinary dive computer - equipped with SCUBAPRO’s most innovative technology - while diving.

Aladin 2G enables you to use two different gas mixtures during the same dive. However, for an easy reading this manual mainly refers to dives with a single gas mixture. Information for diving with two gas mixtures is marked with summarized in special chapters.

We thank you for choosing we hope you will enjoy safe dives in the future! Further information on SCUBAPRO dive computers and other products by SCUBAPRO can be found on our web page at www.scubapro.com.

To make this manual easier to read we will use the term “Aladin 2G” as an abbreviation for “SCUBAPRO Aladin 2G diving computer” throughout this booklet.

Safety considerations

Dive computers provide divers with data; they, however, do not provide the knowledge how this data should be understood and applied. Dive computers cannot replace common sense! You must therefore carefully read and understand this entire manual before using your Aladin 2G.

Important remarks concerning signal words and symbols

This operating manual makes use of the following icons to indicate especially important comments:

NOTE:

)

Information and tips which are

important for optimal use of the functions of Aladin 2G.

Danger!

or has been

Aladin 2G and

The following symbols are used in the operating manual:

Flashing display

Page reference e.g. ->10 Valid only for dives with 2 gas

Audible signals

4 s

Instructions for manual input

Alternate displays

By pushing during the dive you can scroll through alternate displays.

How to get back to the ﬁrst display:

• scrolling with

• after 5 seconds: automatically if marked with

• after 5 seconds: directly by pushing 1x

E.g. Max depth > Temperature, Time > Max depth

Time out after 5 seconds without

mixtures

Audible attention signal

Audible alarm signal

Press left push button Press and hold (1 second)

left push button

Press right

push button

Press

and hold (1 second) right push button

Press and hold (1 second) both

push buttons

through the displays

> Temperature

operation. Display switches back to original indication.

WARNING

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

SCUBAPRO ALADIN 2G

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Quick reference

Time of day / Date Decompression depth / Level stop depth Desaturation time (DESAT) Duration of no-dive warning

Duration of surface interval

Setting icon

Service icon

Current depth

Altitude sections Logbook icon Decompression stop

obligation / Ignored decompression stop

Decompression stop indicator

Level stop indicator Decompression stop duration

Level stop duration

MB level icon (input / MB level reduced)

mix icon (input)

Max depth Temperature MB level Maximum Operating Depth (MOD) Average depth Dive number

Apnea icon

PDIS icon

Average

depth icon

Operating scheme

“->” means “more information at page”

Do not fly icon

No-dive warning

Too fast ascent

Gauge icon

1. Introduction

Dive time / No-fly time / SOS duration Repetitive dive number

Battery icon No-stop indicator

Ascent time icon No-stop time / Total ascent time

MB no-stop time Partial pressure of oxygen ppO Alarm clock icon / Infrared icon

Nitrogen loading bar (dive) Residual Nitrogen bar (surface) Desaturation Battery condition

O2 mix Oxygen toxicity CNS O Ascent rate

Icon for stopwatch and safety stop timer

AMPM

AM/PM icon

DESAT

Desaturation icon

English

/ Scroll / Change setting

Without operation the display switches automatically back to the time of day display and after 3 minutes the display switches off.

SCUBAPRO ALADIN 2G

Enter

Backlight Exit

Gas d

O2%

->48

MB Level

L0-L5

->37

Off

Gas 1

->21

Dive mode

selection

deco/gauge/ APNEA

Altitude

(Algo):

adjustment

->35

->58

• Dual Depth alarm ->66

• Incremental depth

alarm ->66

• Dive time interval

warning ->66

• Surface interval

warning ->67

• Ascent speed alarm ->67

• Water density ->67

Time of day display

Set 3

->63

(Apnea)

• Alarm clock -

• UTC time zone -

• Time of day -

• 24h / AM PM -

• Date -

• Display contrast -

• IrDA speed -

• Sound on / off -

• Electronic ID -

Set 2

->63

Set 1

->58

> 63

> 64

> 65

• (Desat. time CNS O

• Date

->16

• Battery condition

Dive

planner

->54

• Depth alarm -

• Dive time alarm -

• Safety stop duration -

• ppO2 max -

• Reset to air -

• Deco gas on / off -

• PDIS -

• Unit system -

• Sait / fresh water -

• Backlight duration -

• Attention beep on / off -

• Water contacts on / off -

• Reset desaturation -

See also page 15

% ) ->15

->16

Logbook

->56

> 58

> 59

> 60

> 61

> 62

Page 10

1. Introduction

Display switched off

Gas d O2%

Oxygen

–

concentration

ppO2 max

–

Confirmation Confirmation

Gas 1 O2% Diveplanner

Logbook

PLn

Oxygen

–

concentration

ppO2 max

–

Page 1

Max depth

Date of the dive

Page 2

Altitude range (if>0)

Minimum temperature

Page 3

SOS if applicable

(MB level)

DEPTH

DIVE TIME

Dive time

Battery

performance

L O W

Dive number

–

O2 mix

Repetitive dive number Starting time

CNS O2%

CNS O at the end

Surface interval if applicable

Surface

–

interval

()

No-stop dive

DEPTH DEPTH

Depth

–

Decompression dive

Bottom

–

time

DEPTH

DECO

STOP

O2 mix deco gas (if used)

Exit Exit

After the oldest dive:

Statistic information

DEPTH

Deepest dive

Number of dives

DIVE TIME

Longest dive

Cumulative

S L O

bottom time

(MB-) No-stop time

DIVE TIME

NO STOP

DIVE TIME

CNS O2%

SCUBAPRO ALADIN 2G

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2. SYSTEM AND OPERATION

2. System and operation

2.1 System description

Aladin 2G displays all important dive and decompression data and has a memory which stores the full dive data. The data can be transmitted with an infrared interface (IrDA) and SmartTRAK software to a Windows

personal computer.

SmartTRAK software CD is included with the Aladin 2G package.

Aladin 2G

Infrared port

SmartTRAK

Infrared Interface (option)

2.2 Operation

NOTE: On page 7 and 15 you will ﬁnd an operating schematic.

)

2.2.1 Push buttons

Aladin 2G can be operated with two push buttons ( divided into “press” ( / ) and “press and hold (1 second)” ( / ).

At the surface:

• Switch on Aladin 2G (time of day display)

• Comparable to the ENTER or RETURN key of a keyboard

• Enter into the displayed sub menu

• Open the displayed setting

• Confirm or enter the displayed value or setting

• Scroll through a menu

• Once entered with into a sub menu or setting:

•

Increase (

Push buttons Water contacts (one on front and one on back, inaccessible)

indicated value

• Change the setting

• Operate the backlight

• Exit the current function or menu and switch to

the time of day display

• Switch off Aladin 2G

Apnea mode:

• Start dive manually

). Operation of the push buttons is

) or decrease ( ) the

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SCUBAPRO ALADIN 2G

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2. System and operation

Underwater dive mode (Algo):

• Access alternate displays

• Set bookmark

• Operate the backlight

• Activate the safety stop timer (dive mode only,

Gauge mode (stopwatch):

• Restart

Diving with two mixtures:

• Initiate switch to gasd or gas 1

• Confirm switch to gasd or gas 1

2.2.2 Water contacts

On submerging in water the water contacts switch on Aladin 2G automatically.

WARNING

If you have chosen the option “Water contacts off” (“set 1”, ->58), Aladin 2G will turn on with a delay of up to 1 minute into the dive. This will affect functioning of the computer. Make sure that the computer is on before starting the dive.

in depths < 6.5m / 20ft)

• Interrupt switching process

2.2.3 SmartTRAK

With SmartTRAK you can conﬁgure Aladin 2G, transfer dive data to a personal computer and graphically display the data. To start the communication, turn on Aladin 2G and place it so that its infrared port is in front of the infrared interface. If Aladin 2G detects an infrared device within range

Conﬁguring Aladin 2G

To conﬁgure Aladin 2G, select “Dive Computer Settings” under “OPTIONS” on the main menu bar of SmartTRAK after having established communication between your PC and Aladin 2G. The following window will appear:

appears.

SCUBAPRO ALADIN 2G

Page 13

2. System and operation

When making any changes to the settings via SmartTRAK, you must press the "Write" icon for the changes to take effect.

English

SCUBAPRO ALADIN 2G

Page 14

2. System and operation

The following settings may be changed with SmartTRAK or via set 1/set 2/set 3 directly on Aladin 2G:

Scuba Setting Range Default Page

•

Depth alarm 5 - 100m (20 - 330ft) on/off 40m (130ft),off 58

•

Dive time alarm 5-195min, on/off 60min, off 59

•

Safety stop duration 1-5min 3 minutes 59

•

Maximum partial pressure of oxygen (ppO

•

Time limit to reset the O to air

•

Deco gas on/off off 60

•

PDIS (Profile Dependent Intermediate Stop)

•

Unit system metric/imperial 60

•

Water type on (salt water)/off (fresh

•

Backlight illumination duration 2-12s ; push on / push off 6s 61

•

Audible attention signals on / off (SmartTRAK:

•

Water contacts on / off on 61

•

Reset desaturation on / off no reset 62

•

Gauge mode on / off off 33

•

Alarm clock 0 - 23h 59min, on/off 12:00, off 63

•

UTC (Universal Time Change) zone

•

Time of day hours:minutes 64

•

24 or AM/PM setting 24 (off) / AM/PM (on) 64

• Date 64

•

Display contrast 1 (low) -12 (high) 4 64

•

IrDA speed setting (only “set 2”) low / high low

• Sound

max) 1.2-1.6bar 1.4bar 59

% mix

no reset / 1 - 48hrs no reset 59

on/off off 60

on (salt water) 60

water)

on 61

selective)

±13hrs, increments: 15min 63

on / off on 65

Apnea Setting

Dual Depth alarm 1 5-100m (20-330ft) 10m (35ft), off 66

•

Dual Depth alarm 2 5-100m (20-330ft) 20m (65ft), off 66

•

Incremental depth alarm 5-100m (20-330ft),

5m (20ft), off 66

way down, way up, both off

•

Dive time interval warning 15s-10min, on/off 30s, off 66

•

Surface interval warning 15s-10min, on/off 1 min, off 67

•

Ascent speed alarm 0.1-5 m/s (1-15ft/s) 1 m/s (3 ft/s), off 67

•

Water density 1.000-1.050 kg/l 1.025 kg/l 67

The following data may be recalled with SmartTRAK:

•

Number of past dives • Logbook

•

Total duration of dives • Temperature curve

• Deepest dive • Alarms and attention messages

• Longest dive • Bookmarks

•

Atmospheric pressure • Average depth

• Dive profile • Battery condition

SCUBAPRO ALADIN 2G

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2. System and operation

Downloading your dives

Dive window

Dive information panel

Aladin 2G’s memory allows you to store approximately 25 hours of SCUBA dive proﬁle information in 4 second sampling intervals. In Apnea mode the display is updated faster (in 0.25s intervals and logbook in 1s intervals), therefore in Apnea mode at least 6h of Apnea proﬁles will be stored. With SmartTRAK you can transfer this information to the PC in order to visualize and analyze your dives on the monitor. To download data from Aladin 2G, click on “NEW” under the “LOGBOOK” menu to open and name a new logbook or open an existing logbook. Then click on the “TRANSFER DIVES” icon: a box will appear on the screen identifying the computer being downloaded, and a progress bar will show the status of the transfer. You can choose between transferring all dives or new dives only (default setting) from Aladin 2G’s memory. If you choose to transfer new dives only, SmartTRAK will only transfer dives that are more recent than the most recent dive already saved in the PC logbook. To transfer all dives, you must change the default setting by selecting “Transfer” under “Dives” in the main menu bar.

Once the data is downloaded, a window will show you a summary table of all dives; for the selected dive, another window will show you its details. From these windows you can add and edit your dive information.

English

Dive proﬁle panel

Alarm symbols

Notes panel

SCUBAPRO ALADIN 2G

Dive computer display

Tissue panel

Physiology panel

Page 16

2. System and operation

Dive table

2.2.4 Switching on the display

• automatically, on submerging in water* or when adaptation to atmospheric pressure is necessary;

• manually, by pushing

• Afterwards the display shows the time of the day, the O mix and the temperature.

NOTE: This display is called time of day display. Most

)

navigation descriptions start from this display. At the surface Aladin 2G returns automatically to this display.

If there is a remaining saturation from the last dive or from

Time of day display

a change of altitude, Aladin 2G also displays the “do not ﬂy” time, the “do not ﬂy” icon, the current altitude range and the prohibited altitude range (->31).

NOTE: When Aladin 2G is in state of rest no information

)

is displayed but the atmospheric pressure is continuously monitored. If a change in altitude range is detected, Aladin 2G switches on for 3 minutes automatically ->31.

Only if the option “Water contacts on” (“set 1”, ->61) is chosen. See warning

->10.

all segments light up for 5 seconds.

or . If switched on with

SCUBAPRO ALADIN 2G

Page 17

2. System and operation

2.2.5 How to navigate Aladin 2G at the surface

Starting from the time of day display you can enter into different menus.

“->” means “more information at page”

Off

Gas 1

Gas d

• Enter with function or sub menu.

• With you can switch to the time of day display.

• After 3 minutes without operation Aladin 2G returns to the time of day display.

O2%

->48

MB Level

L0-L5

->37

into the

O2%

->21

Dive mode

selection (Algo):

deco/gauge/ APNEA

->35

Altitude

adjustment

->58

• Dual Depth alarm ->66

• Incremental depth alarm ->66

• Dive time interval

warning ->66

• Surface interval

warning ->67

• Ascent speed alarm ->67

• Water density ->67

2.2.6 Checking the desaturation time

No-ﬂy time

Do not ﬂy icon

DESAT

S L O W

Desaturation time

CNS O2%

No-dive warning

Residual nitrogen bar

Oxygen toxicity

From the time of day display you can check the desaturation time* by pushing

. Desaturation time is determined either by oxygen toxicity, nitrogen saturation or the regression of microbubbles, depending on which requires the longer time.

Time of day display

Set 3

->63

(Apnea)

Set 2

->63

• (Desat. time CNS O2% )

• Date -

• Battery condition -

Set 1

Dive

planner

->58

->54

->15 >16 >16

Logbook

->56

• Alarm clock -

• UTC time zone -

• Time of day -

• 24h / AM PM -

• Date -

• Display contrast -

• IrDA speed -

• Sound on / off -

• Electronic ID -

> 63

> 64

> 65

• Depth alarm -

• Dive time alarm -

• Safety stop duration -

• ppO2 max -

• Reset to air -

• Deco gas on / off -

• PDIS -

• Unit system -

• Sait / fresh water -

• Backlight duration -

• Attention beep on / off -

• Water contacts on / off -

• Reset desaturation -

> 58

> 59

> 60

> 61

> 62

The display switches back to the time of day display after 5 seconds without operation.

* Only displayed if there is a remaining saturation due to the last dive or change of altitude.

WARNING

For the calculations of the desaturation and no-ﬂy time it is assumed that the diver breathes air while on the surface.

English

SCUBAPRO ALADIN 2G

Page 18

2. System and operation

2.2.7 Checking the surface interval

Surface interval

From the time of day display you can check the surface interval by pushing (logbook menu).

The surface interval is the time since the end of the last dive and is displayed as long as there is remaining saturation.

2.2.8 Displaying the date

Date

From the time of day display you can display the date by pushing 1x or 2x

(depending on whether there is

desaturation time left).

The display switches back to the time of day display after 5 seconds without operation.

2.2.9 Checking the battery condition

3 x (depending on whether there is desaturation time left).

Aladin 2G displays the estimated remaining battery performance for 5 seconds as a bar graph. If the bar graph shows 3 segments the battery warning appears ->21 and the battery has to be replaced ->68.

WARNING

• If the bar graph shows 2 segments, the battery symbol will blink, on the surface and in dive mode, to alert the diver of a dangerous situation: the battery may not have enough energy to ﬁnish a dive.

• Replace the battery when the steady battery symbol appears (3 segments)!

NOTE: The temperature inﬂuences the

)

battery performance. In cold water it is lower than in warm water. If the battery shows 4 segments on the surface, it is possible for it to drop to 3 segments during the dive. If this is the case, the backlight will be temporarily disabled. See below.

Bar graph interpretation

Battery condition / performance

From the time of day display you can check the battery condition by pushing 2x or

Battery performance high

enough for diving.

Battery warning appears.

Backlight deactivated. Replace

the battery! ->68

Diving not possible, dive planner and settings are disabled

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2. System and operation

WARNING

Flashing battery warning. Audible alarms and attention messages disabled! Backlight deactivated! Risk of computer malfunction. Do not let the battery reach this condition!

Aladin 2G marks dives started with 3 or less segments in the logbook with the battery symbol. Logbook information is not lost even when the battery is removed for a long time.

2.2.10 Active backlight

The display of Aladin 2G can be illuminated both on the surface and underwater. The backlight can be activated by pushing

. The light will turn off automatically. The default duration is 6 seconds. The duration can be changed in “set 1” (->58) or with SmartTRAK between 2 and 12 seconds. It can also be set to “push on / push off”, in which case the light stays on until you turn it off by pressing The backlight can only be activated if the computer display is on.

again.

come on within the ﬁrst dive. For temperatures between 4 °C/40 °F and 20 °C/68 °F the life of a new battery will be somewhere between 1 and 20 1-hour dives. Aladin 2G monitors the battery level throughout every dive, and if the available energy drops below the warning threshold, Aladin 2G will automatically disable the backlight to prevent a computer shut down.

2.2.11 Switching off the display

From the time of day display you can switch off Aladin 2G by pushing

On the surface Aladin 2G switches off automatically after 3 minutes without operation.

2.2.12 Alarm clock

The alarm clock goes off only at the surface. If the alarm clock is “on”, the time of day display shows

When alarm is triggered: special attention beeps are played for 30 seconds or until the user presses a button.

Setting the alarm clock: ->63 (“set 2”)

ﬂashes and

2.3 SOS mode

Time remaining until SOS mode

switches off automatically

DESAT

English

NOTE: Repeated activation of the

)

backlight will reduce battery life.

NOTE: Keeping the backlight

)

permanently on represents a severe strain on the battery. In warm waters (20 °C/68 °F and above), a new battery can sustain 20-40 1-hour dives with the backlight always on. In cold waters (4 °C/40 °F and below) the low battery warning may

SCUBAPRO ALADIN 2G

Activation: automatic If the diver remains above a depth of 0.8m (3ft) for more than three minutes without observing a prescribed decompression stop, the computer will automatically switch into SOS mode after the dive. Push remaining length of the SOS mode. The

to see the “SOS” sign and the

Page 20

2. System and operation

dive will be entered in the logbook with “SOS”.

The SOS mode will be unlocked after 24 hours.

While in SOS mode, the computer cannot be used for diving. The computer can however be used in gauge mode ->33. All segments in the nitrogen loading bar will ﬂash throughout the dive.

Diving within 48 hours after the end of an SOS mode will result in shorter no stop times or longer decompression stops.

WARNING

• Serious injury or death may result if a diver does not seek immediate treatment should any signs or symptoms of decompression sickness occur after a dive.

• Do not dive to treat symptoms of decompression sickness!

• Diving in SOS mode is extremely dangerous and you must assume full responsibility for such behavior. SCUBAPRO will assume no liability.

A diving accident can be analyzed at any time in the logbook and downloaded to a PC by means of the infrared interface (IrDA) and SmartTRAK software.

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3. DIVING WITH ALADIN 2G

3.1 Terminology / Symbols

The information on the display of Aladin 2G varies depending on the kind of dive and the dive phase.

3.1.1 General terminology / Display during no-stop phase

Current depth

In metres (feet)

DEPTH

Max depth

Max depth reached during the dive

Oxygen toxicity

CNS O

Ascent rate

(Only while ascending)

DIVE TIME

NO STOP

CNS O2%

Dive time

Duration of the dive (min)

Nitrogen loading bar

No-stop time

Remaining time at a given depth during which ascent is allowed without decompression stop (min).

No-stop phase

Dive phase during which surfacing is allowed without stop.

Time

Depth

26.2m

Max depth

37min dive time

Elapsed bottom time

NOTE: For information about diving

)

with microbubble (MB) levels see

->37. Speciﬁc features of “Diving with two gas mixtures”, are described in chapter 8 ->48.

Current depth

3. Diving with Aladin 2G

Decompression phase

Dive phase during which surfacing is allowed only after decompression stops are completed.

24min

No-stop time

English

(Max depth >) Temperature

> Temperature , O2 mix and time of day > (Max depth)…

3.1.2 Display during decompression phase

Decompression stop

All required decompression stops must be observed.

DEPTH

DECO

STOP

Decompression stop depth

Deepest stage is displayed.

Decompression stop duration

Prescribed duration of the decompression stop at the displayed decompression stage (minutes).

SCUBAPRO ALADIN 2G

Time

Total ascent time to surface (7min)

DIVE TIME

Depth

Deepest decompression stop depth

2min

CNS O2%

Decompression

stop duration

35.7m

Decompression rangeNo-stop range

Total ascent time

Including decompression stops in minutes.

Page 22

3. Diving with Aladin 2G

3.1.3 Nitrox information (O2 information)

For dives with compressed air in normal recreational diving, nitrogen is the decisive gas for the decompression calculations. When diving with Nitrox, the risk of oxygen toxicity rises with the increase of the fraction of oxygen and the increase of depth and can limit dive time and the max depth. Aladin 2G includes this in the calculations and displays the necessary information:

% mix Fraction of oxygen: The

fraction of oxygen in the Nitrox mixture can be set between 21% (normal compressed air) and 100% in 1% increments. Your selected mix will be the basis for all calculations.

ppO

max Maximum allowed partial

pressure of oxygen: the higher the

fraction of oxygen in the mixture, the shallower the dive depth at which this value of the partial pressure of oxygen is reached. The depth at which ppO

max is reached is

called Maximum Operating Depth (MOD). When you enter the settings for the gas mixture, Aladin 2G will display the ppO

max

limit setting and the corresponding MOD. Aladin 2G warns you audibly and visually once the depth is reached at which the ppO2 reaches the maximum allowed value

->25.

NOTE:

)

• Default setting of ppO2 max is 1.4bar. The value of ppO2 max can be set by means of SmartTRAK or with “set 1” between 1.2 and 1.6bar (->59). It can also be changed at the time of setting the gas mixture (->21).

• The CNS O2% value/alarm is not influenced by the selected ppO2 max setting.

CNS O2% Oxygen toxicity: With the increased percentage of oxygen, the oxygen in the tissues, especially in the central nervous system (CNS), becomes important. If the partial pressure of oxygen rises above 0.5bar, the CNS O

value

increases, if the partial pressure of oxygen is below 0.5bar, the CNS O

value decreases.

The closer the CNS O2 value is to 100%,

the closer the limit where symptoms of oxygen toxicity can occur.

Depth

at which ppO reaches 0.5bar for three commonly used mixes 21% 13m (43ft) 32% 6m (20ft) 36% 4m (13ft)

CNSO

decreases

CNSO2%

increases

ppO

0.21bar

0.5bar

WARNING

Nitrox diving may only be attempted by experienced divers after proper training from an internationally recognized agency.

3.2 Attention messages and alarms

Aladin 2G draws the diver’s attention to certain situations and warns the diver of unsafe diving practices. Attention messages and alarms are visual and / or audible.

NOTE:

)

• The audible attention messages can be switched off in “set 1” ->58 or SmartTRAK. With SmartTRAK they can be switched off selectively.

• In addition, the sound can be turned off completely in “set 2” ->65.

WARNING

If you turn off the sound you will have no audible warnings. Without audible warnings you could inadvertently get into potentially hazardous situations which could result in death or serious injury.

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3. Diving with Aladin 2G

WARNING

Serious injury or death may result from failing to immediately respond to alarms given by Aladin 2G.

3.2.1 Attention messages

Attention messages are communicated to the diver visually by symbols, letters or ﬂashing ﬁgures. In addition, two short audible sequences can be heard (in an interval of 4 seconds) in two different frequencies under water.

4s (can be switched off)

Attention messages come up in the following situations (more information can be found on the listed pages):

• Maximum Operating Depth / ppO is reached 25

• Set max depth is reached 24

• Oxygen toxicity reaches 75% 26

• No-stop time less than 3 minutes 27

• Prohibited altitude (surface mode) 31

• Entering decompression

(when diving with L0) 27

• Half of set dive time is reached 23

• Set dive time is reached 23

• Depth for tank switch has been reached 52

Diving with MB levels (L1-L5):

• MB no-stop time = 0 40

• MB level stop ignored 40

• MB level reduced 41

• Entering decompression when diving with MB level L1-L5 41

3.2.2 Alarms

Alarms are given to the diver visually by ﬂashing symbols, letters or ﬁgures. In addition, an audible sequence in one frequency can be heard during the whole duration of the alarm.

Page

max

• Low battery alarm (without audible

• Apnea mode alarm 35

alarm): the battery icon appears if the battery has to be replaced 68

3.3 Preparation for the dive

You have to check the settings of Aladin 2G especially before the ﬁrst dive. All settings can be checked and changed directly at Aladin 2G or via SmartTRAK.

3.3.1 Setting the gas mixture and ppO

max

WARNING

Before every dive and after changing the tank, make sure that the settings for the gas mixture correspond with the current mixture used. An incorrect setting causes Aladin 2G to miscalculate this particular dive. If the fraction of oxygen is set too low this can lead to oxygen poisoning without warning. If the value is set too high decompression sickness may occur. Inaccuracies in the calculations are carried over to repetitive dives.

For dives with two gas mixtures please read page 48 for further reference. To set the gas mixture, Aladin 2G must be in user mode (time of day display).

or until

1. Push or until the GAS 1 O2

menu appears.

Conﬁrm that you wish to change the oxy-

gen fraction of gas 1 by pushing .

English

An alarm occurs in the following situations (more information can be found on the listed pages):

• Oxygen toxicity reaches 100% 26

• Ignored decompression 28

• Exceeding the prescribed ascent rate 24 (Particular scale of beeps, ->25)

• Altitude alarm 31

SCUBAPRO ALADIN 2G

Page

Page 24

3. Diving with Aladin 2G

ppO

max

Max Operating Depth MOD

Change the O2% mix by (+) and

(–)

3. Change the oxygen fraction in increments of 1% by pushing or

. Aladin 2G will display the current fraction of oxygen, the maximum partial pressure limit (ppO

max) and the MOD.

4. Confirm the selected percentage with .

SmartTRAK between 1 and 48 hours or to “no reset” (default).

3.3.2

Setting the MB level

See chapter 6, ->37

3.3.3

Preparation for diving with

two gas mixtures

See chapter 8, ->48

3.3.4 Preparation for the dive and function check

Switch on Aladin 2G by pushing and check the test display: Are all elements of the display activated? Do not use Aladin 2G if the display does not show all elements. When switching on Aladin 2G with the test display will not appear.

WARNING

Check the battery capacity before each dive

->16.

Change the ppO2 max by (+) and

(–)

5. By pushing or you can change the ppO

max for the chosen

fraction of oxygen down to 1.0bar. Aladin 2G will now display the corresponding MOD for the new ppO

6. Confirm your ppO

max settings with

max.

NOTE:

)

• Without confirmation the display will disappear after 3 minutes and your entries will not be accepted.

• Automatic reset of the O

% mix to

21% can be set with “set 1” ->58 or

3.4 Functions during the dive

3.4.1 Immersion

If the water contacts are deactivated (->61), switch on Aladin 2G before immersion.

WARNING

If you have chosen the option “Water contacts off” (“set 1” or SmartTRAK), Aladin 2G will turn on with a delay of up to 1 minute into the dive. This will affect functioning of the computer. Make sure that the computer is on before starting the dive.

After immersion, starting at a depth of about 0.8m (3ft), all diving functions

SCUBAPRO ALADIN 2G

Page 25

3. Diving with Aladin 2G

are monitored, i.e. depth and

dive time displayed, max depth stored, saturation of tissues calculated, no-stop time or decompression

prognosis determined, ascent rate controlled and displayed and the correctness of the decompression procedure supervised.

3.4.2 Setting bookmarks

During the dive you can create bookmarks in your dive proﬁle by pressing

. The logbook icon appears for 4 seconds and an audible signal conﬁrms the creation of the bookmark. These bookmarks will be graphically displayed in the dive proﬁle of SmartTRAK.

3.4.3 Dive time

Dive time

DEPTH

DIVE TIME

NO STOP

WARNING

Set dive time has elapsed ->23, 59 An audible signal goes off and the dive time starts ﬂashing.

3.4.4 Current depth / O2% mix

Current depth is given in 10cm increments in metric setting and 1ft increments in imperial setting.

Current depth

DEPTH

O2% mix Nitrogen

DEPTH

DIVE TIME

S L O

DIVE TIME

NO STOP

loading bar

English

The whole time spent below a depth of 0.8m (3ft) is displayed as dive time in minutes. The time above 0.8m (3ft) is counted as dive time only if the diver descends again below 0.8m (3ft) within 5 minutes.

While the dive time is running, the colons on the right of the ﬁgures are ﬂashing in one second intervals. Maximum dive time displayed is 199 minutes.

NOTE: If a dive lasts longer than 199

)

minutes the dive time display starts again at 0 minutes.

Half time alarm (turn around alarm) ->59 If half of the set maximum dive time has elapsed, an audible signal goes off and ﬂashes for 1 minute.

SCUBAPRO ALADIN 2G

WARNING

At a diving depth of less than 0.8m (3ft) the display shows “ – – – “.

% mix is diplayed as long as

The O

CNS O2% = 0 and no ascent speed is indicated.

3.4.5 Max depth / Temperature

DEPTH

Max depth

DIVE TIME

NO STOP

CNS O2%

Page 26

3. Diving with Aladin 2G

Max depth is only displayed if it exceeds the current depth by more than 1m (3ft) (maximum indicator function). If max depth is not displayed, Aladin 2G shows the temperature.

Temperature, O2 mix

Temperature , Time , O2 mix

Max depth

Set max depth reached

DEPTH

DIVE TIME

NO STOP

WARNING

If the max depth set with SmartTRAK or “set 1” has been reached (default 40m/130ft) and the depth alarm is turned on, the depth display will ﬂash. Ascend until the depth stops ﬂashing.

3.4.6 Ascent rate

DEPTH

DIVE TIME

NO STOP

S L O

Ascent rate

Optimal ascent rate varies depending on depth between 7 and 20m/min (23 and 67ft/min). It is displayed as a percent of the reference variable ascent rate. If the ascent rate is greater than 100% of the set value, the black arrow “SLOW” appears. If the ascent rate exceeds 140%, the arrow starts ﬂashing. Aladin 2G provides an audible alarm if the ascent rate is 110% or greater. The intensity of the alarm increases in direct proportion to the degree that the prescribed ascent rate is exceeded.

WARNING

The prescribed ascent rate must be observed at all times! Exceeding the prescribed ascent rate can lead to microbubbles in the arterial circulation which can lead to serious injury or death due to decompression sickness.

• In case of an improper ascent Aladin 2G may require a decompression stop even within the no-stop phase because of the danger of microbubble formation.

• The decompression duration necessary for the prevention of microbubbles can increase massively if the ascent rate is exceeded.

• From great depth a slow ascent may cause heightened saturation of tissues and an extension of both decompression duration and total ascent time.

At shallow depth, a slow ascent may

shorten the decompression duration.

SCUBAPRO ALADIN 2G

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3. Diving with Aladin 2G

• Display of the ascent rate has the priority over “CNS O

”.

WARNING

Ascent rate Visual alarm Audible alarm

Reduce ascent rate

Excessive ascent rates for longer periods are entered in the logbook.

The following ascent rates correspond to the 100% value in Aladin 2G.

depth (m) speed (m/min) depth (ft) speed (ft/min)

<6 7 <20 23

<12 8 <40 26

<18 9 <60 29

<23 10 <75 33

<27 11 <88 36

<31 13 <101 43

<35 15 <115 49

<39 17 <128 56

<44 18 <144 59

<50 19 <164 62

>50 20 >164 66

L O W

S L O W

3.4.7 Partial pressure of oxygen (ppO2 max) / Maximum Operating Depth (MOD)

DEPTH

DIVE TIME

NO STOP

CNS O2%

Max Operating Depth MOD

The maximum partial pressure of oxygen ppO

max (default 1.4bar) determines the

Maximum Operating Depth (MOD). Diving deeper than the MOD will expose the diver to oxygen partial pressures higher than the set maximum level.

The ppO can be reduced manually (->21, setting the

max and consequently the MOD

gas mixture, point 5).

In addition the maximum allowed ppO

can

be set by means of SmartTRAK or with “set 1” between 1.2 to 1.6 bar ->59.

WARNING

The MOD is a function of ppO2 max and the mixture used. If during the dive the MOD is reached or exceeded Aladin 2G sends an audible attention message and the MOD is displayed (ﬂashing) in the lower left corner. Ascend to a depth shallower than the displayed MOD in order to diminish the danger of oxygen poisoning.

English

SCUBAPRO ALADIN 2G

WARNING

The MOD should not be exceeded. Disregarding the warning can lead to oxygen poisoning.

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3. Diving with Aladin 2G

3.4.8 Oxygen toxicity (CNS O2%)

CNS O2%

DEPTH

DIVE TIME

NO STOP

Oxygen toxicity

Aladin 2G calculates oxygen toxicity based on depth, time and the gas mixture and displays it in the location of the ascent rate. The toxicity is expressed in 1% increments of a maximum tolerated value (O

clock).

The symbol “CNS O2” is displayed together with the percentage.

DEPTH

DIVE TIME

NO STOP

CNS O2%

WARNING

An audible attention signal goes off if oxygen toxicity reaches 75%. The symbol “CNS O2” ﬂashes. Ascend to shallower depth to decrease oxygen loading and consider terminating the dive.

CNS O2%

WARNING

When oxygen toxicity reaches 100%, an audible alarm goes off every 4 seconds. “CNS O2” and the percentage value ﬂash. Danger of oxygen toxicity! Start procedure for terminating the dive.

NOTE:

)

• During an ascent and if the CNS O value does not increase anymore (due to a lower partial pressure of oxygen), the audible warning is suppressed.

• During the ascent, the display of the oxygen toxicity is replaced by the ascent rate. If the ascent is stopped, the display changes back to the indication of the CNS value.

• Aladin 2G will display CNS O2% values exceeding 199% with 199%.

3.4.9 Nitrogen loading bar graph

The nitrogen loading bar gives a graphical representation of how close to decompression you are. As you absorb nitrogen during the dive, more and more segments of the bar will light up. Depending on your depth, the segments can light up more or less rapidly.

1-3 segments (green area): you are safely within the no-stop range

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3. Diving with Aladin 2G

4-5 segments (yellow area): you are approaching decompression. When the no-stop time drops below 3 minutes the 5 segments will start ﬂashing.**

6 segments (red area): you now have mandatory decompression obligation(s) which you must observe before reaching the surface.

** Depending on your proﬁle, the no-stop time may drop below 3 minutes before the upper 5 segments are lit. In this case, only those segments that are lit will ﬂash.

If you have entered decompression, the 6th segment will turn off as soon as you complete your last decompression obligation to indicate that you are no longer in decompression.

3.4.10 Decompression information

NO STOP and the no-stop time (minutes) are displayed if no decompression stops are necessary.

DEPTH

DIVE TIME

NO STOP

CNS O2%

stop value and the nitrogen loading bar begin to ﬂash. If no-stop time is less than 1 minute, the nostop display shows the ﬂashing value “0”. In order to prevent a decompression dive, ascend slowly until the no-stop time is 5 minutes or more.

DEPTH

No-stop time less than 1 minute

DIVE TIME

NO STOP

CNS O2%

WARNING

Decompression diving requires advanced training from a recognized agency. Do not attempt decompression diving without proper training from a recognized agency.

Decompression values

Decompression obligation

DEPTH

DIVE TIME

English

NOTE:

)

• No-stop display “99:” means remaining time of 99 minutes or more.

• No-stop time is influenced by the water temperature.

If no-stop time drops below 3 minutes, an audible attention signal is activated, the no-

SCUBAPRO ALADIN 2G

No-stop time

Nitrogen loading bar

WARNING

DECO

STOP

CNS O2%

Decompression stop duration

On entering the decompression phase, “NO STOP” disappears, the

Decompression depth

DECO

STOP

symbol appears and an attention beep goes off. The nitrogen loading bar stops ﬂashing and the 6th segment lights up (red area). The deepest decompression stage in metres (feet) is displayed and the decompression

Page 30

3. Diving with Aladin 2G

stop duration of the displayed stage appears in minutes. The display “7: 3m (10ft)” means that a decompression stop of 7 minutes at a depth of 3m (10ft) has to be made.

When a decompression stop has been completed, the next (shallower) decompression stop is displayed. When all decompression stops have been completed, the

DECO

STOP

symbol extinguishes, “NO

STOP” and no-stop time reappear.

Deco stop depths deeper than 27m (90ft) are displayed as “ – – : – – ”.

DEPTH

DECO

STOP

Ignored decompression alarm

DIVE TIME

CNS O2%

WARNING

The decompression alarm is activated if the decompression stop is ignored. The arrow

DECO

STOP

, the decompression stop duration and decompression stop depth begin to ﬂash and an audible alarm goes off. Due to the formation of microbubbles, decompression can increase massively if a decompression stop is ignored. When the surface is reached during the decompression alarm, the arrow stop duration and decompression stop depth continue ﬂashing, in order to point to the risk of a decompression accident. The SOS mode is activated 3 minutes after the dive if corrective action is not taken (->17). If the total (cumulative) duration of the decompression alarm is longer than one minute, it is entered in the logbook. Descend to the prescribed decompression stop depth immediately!

DECO

STOP

, the decompression

Total time of ascent

DECO

STOP

DEPTH

DIVE TIME

CNS O2%

Total ascent time

As soon as decompression stops are necessary Aladin 2G shows the total time of ascent. This includes the ascent time from the current depth to the surface and all decompression stop obligations.

NOTE:

)

• The total time of ascent is calculated on the basis of the prescribed ascent rate. Total time of ascent can be subject to change if the ascent rate is not ideal (100%).

• Ascent time greater than 99 minutes is displayed as “ – – ”.

WARNING

On all dives with Aladin 2G, make a safety stop for at least three minutes at a depth of 5m (15ft).

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3. Diving with Aladin 2G

3.4.11 Safety stop timer

DEPTH

STOP

Safety Stop icons

DIVE TIME

CNS O2%

Remaining time span

(minutes / seconds)

The safety stop timer displays the time span a diver should spend at the safety stop depth at the end of the dive. The timer starts automatically when depth is shallower than 6.5 m and counts back from 3 minutes (default) to zero. It can be restarted manually any number of times. The duration of the timer can be set between 1 and 5 minutes.

The safety stop timer will be activated under the following conditions: <6.5 m

(21ft)

, no-stop display 99 min, gauge

depth

mode is switched off, stop time is selected (1-5 min) at set 1 menu.

Activate the safety stop timer by pressing

. The timer begins to count backwards and a bookmark will be created in the dive proﬁle. If you press again, the timer will start again from the full value.

The safety stop timer will switch off automatically if the depth exceeds 6.5 m (21 ft) or the no-stop phase is shorter than 99 minutes.

3.5 Functions at the surface

3.5.1 End of a dive

DEPTH

Depth less than 0.8m (3ft)

DIVE TIME

CNS O2%

After reaching the surface (<0.8m/3ft) Aladin 2G remains in dive mode for 5 minutes. The delay allows for surfacing for a short period for orientation. After 5 minutes the dive is closed and it is entered into the logbook. The time of day is then displayed for 3 minutes, after which the computer turns off.

WARNING

For the calculations of the desaturation and no-ﬂy time it is assumed that the diver breathes air while on the surface.

3.5.2 Residual nitrogen bar graph

The segments in the residual nitrogen bar graph will gradually turn off as Aladin 2G follows the offgassing of your tissues during your surface interval. There is a 1:1 equivalence in the meaning of the segments between diving and surface. Thus, on a repetitive dive the bar will resume from its status on the surface just prior to the dive. There are two exceptions however:

• the uppermost segment will stay lit until the desaturation time is completely extinguished. This is done to show that there is desaturation time left and that a dive started at this point will be logged as a repetitive dive. If the remaining desaturation time is very short, this segment could however at first disappear during the dive;

• during the 24 hours of an SOS-lock, all segments will stay on.

English

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3. Diving with Aladin 2G

3.5.3 Desaturation time, No-ﬂy time and No-dive warning

No-ﬂy time

Do not ﬂy icon

No-dive warning

DESAT

S L O W

Time of day

Residual nitrogen bar

Ascent to altitude range 4 prohibited

5 minutes after a dive Aladin 2G shows the time of day, the “do not ﬂy time”, the no-dive warning (if applicable), the current altitude range and the prohibited altitude range (->31).

No-fly time is the time in hours that should pass before a ﬂight and is displayed and adjusted until the value becomes 0 hours.

WARNING

Flying while Aladin 2G displays “do not ﬂy” may lead to serious injury or death from decompression sickness.

WARNING

If the “no-dive” warning is visible during the surface interval, the diver should not undertake another dive.

To check the remaining desaturation time and oxygen toxicity press

CNS O2%

S L O

Desaturation time Residual

Oxygen toxicity

nitrogen bar

To check the elapsed surface interval press .



Surface interval

Desaturation time is determined either by oxygen toxicity, nitrogen saturation or the regression of microbubbles, depending on which requires the longer time.

No-dive warning

If Aladin 2G detects a situation of increased risk (due to the potential of microbubble accumulation from previous dives or a CNS O2 level above 40%), the no-dive symbol will appear on the display. The duration of the no-dive warning is visible in the dive planner menu. Aladin 2G recommends this as minimum surface interval in order to reduce the number of microbubbles and/or to reduce the CNS O

level below 40%.

Note: You should not undertake a

)

dive as long as the no-dive warning message is displayed on the computer screen. If the warning is prompted

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3. Diving with Aladin 2G

by microbubble accumulation (as opposed to CNS O

over 40%) and you

dive anyway, you will have shorter nostop times or longer decompression times. Moreover, the duration of the no-dive warning at the end of the dive can increase considerably.

3.6 Diving in mountain lakes

3.6.1 Altimeter

The altitude adjustment ->58 does not affect altitude ranges nor any calculations.

3.6.2 Altitude ranges

Altitude icon

Altitude range 2

Aladin 2G measures the atmospheric pressure every 60 seconds even while the display is switched off. If the computer detects a sufﬁcient increase in altitude, it switches on automatically and indicates the new altitude range (1-4) and the desaturation time. Desaturation time indicated at this moment refers to adaptation time at this altitude. If the dive starts within this adaptation time, Aladin 2G treats it as a repetitive dive, since the body is offgassing. Altitude is divided into ﬁve ranges, which are inﬂuenced by barometric pressure. That is why the deﬁned altitude ranges overlap on their fringes. If a mountain lake is reached, the altitude range is indicated at the surface (time of day display), in the logbook and in the dive planner by a stylized mountain and the current altitude range. Sea level to an altitude of approximately 1000m (3300ft) is not indicated. In the following diagram, you can see the approximate breakdown of the altitude ranges:

Altitude ranges

English

SCUBAPRO ALADIN 2G

No deco data gauge mode

4000m 13120ft

3000m 9840ft

2000m 6560ft

1000m 3280ft

Switching

at approx.

610mbar

8.85psi

725mbar

10.51psi

815mbar

11.82psi

905mbar

13.12psi

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3. Diving with Aladin 2G

3.6.3 Prohibited altitude

Ascent to altitude

range 3 and 4

prohibited.

Max allowed

altitude: 2650m

(8694ft).

WARNING

Aladin 2G shows via ﬂashing alti while at the surface to which altitude may not rise.

Max altitude: 850m/2790ft

Max altitude:

2650m/8694ft

The ascent prohibition can also be displayed together with an altitude range:

Example: You are at 1200m (3937ft) (altitude range 1) and

you may ascend to range 2 only (2650m / 8694ft). You may not rise to the altitude range 3 or 4.

tude segments

the diver

Max altitude:

1650m/5413ft

Max altitude:

4000m/13120ft

3.6.4 Decompression dives in mountain lakes

DEPTH

Dive at altitude range 4: no deco data (gauge mode)

DIVE TIME

In order to assure optimal decompression even at higher altitudes, the 3m (10ft) decompression stage is divided into a 4m (13ft) stage and a 2m (7ft) stage in altitude ranges 1, 2 and 3. The prescribed decompression stop depths are, in sequence, 2m / 4m / 6m / 9m… (7ft / 13ft / 20ft / 30ft…).

If atmospheric pressure is below 620mbar (8.99psi) (altitude higher than 4100m / 13450ft above sea level), Aladin 2G switches automatically to gauge mode and no decompression data is calculated and displayed.

In addition, the dive planner is not available anymore.

WARNING

If an ascent to a prohibited altitude is detected, an audible alarm goes off for 1 minute. Descend to a lower altitude.

SCUBAPRO ALADIN 2G

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4. Gauge mode

4. GAUGE MODE

WARNING

In gauge mode ALL audible and visual alarms and attention messages are turned off.

In gauge mode Aladin 2G will display depth, dive time and max depth. By pressing

you can scroll from the max depth to the temperature, to the average depth, to the time of day and back to the max depth. By pressing

you can restart the stopwatch. This generates a bookmark. Gauge mode does not support the calculation of no-stop time or the supervision of decompression. Supervision of ppO

max and CNS O2%

will also be switched off. Aladin 2G will display no information about microbubble development. The settings for the gas mixture, MOD and microbubble level cannot be set and the dive planner cannot be selected.

Switching the gauge mode on and off

Gauge mode can be switched on and off at the surface, when there is no desaturation and no-dive in gauge mode has been made in the last 48 hours.

WARNING

• Dives in gauge mode are performed at your own risk!

• After diving in gauge mode you must wait for at least 48 hours before using a decompression computer.

After diving in gauge mode, Aladin 2G can not be used as dive computer for 48 hours.

Procedure:

1. From the time of day display push until the “ALGO” is displayed.

(If Aladin 2G shows “ – – – ” the gauge

mode cannot be switched “on” or “off”. Aladin 2G shows “ – – – ” for 48 hours after a dive in gauge mode and as long as there is remaining desaturation after a dive in computer mode.)

2. Conﬁrm with

that you wish to activate or deactivate the gauge mode. “deco”, “gauge” or “apnea” starts ﬂashing.

3. By pushing

or the mode will scroll between: Gauge, Deco (SCUBA diving) or Apnea. Select: “Gauge”.

4. Conﬁrm your settings with

Without conﬁrmation the display will disappear after 3 minutes and your entries will not be accepted.

Diving in gauge mode

The following information is displayed in gauge mode:

DEPTH

Current

depth

Stopwatch

Max depth / Temperature / Average depth (AVG)

DIVE TIME

Dive time

Gauge icon

>Temperature >Average depth (AVG) >Temperature , Time >Max depth

The average depth is continuously updated and represents the time averaged depth since the beginning of the dive. You can reset the average depth at any time by pushing

. This generates also

a bookmark.

English

SCUBAPRO ALADIN 2G

Page 36

4. Gauge mode

Stopwatch

Stopwatch icon

Timing

DEPTH

Hours

DIVE TIME

Minutes Seconds

In gauge mode, after immersion, Aladin 2G will automatically monitor the dive time and at the same time activate the stopwatch. The stopwatch will run for a maximum of 24 hours.

Resets time and starts stopwatch from zero. Each start (restart) of the stopwatch creates a bookmark.

After diving in gauge mode

Remaining time during which Aladin 2G cannot

be used in computer mode

Aladin 2G shows the remaining time span during which it cannot be used in computer mode. Once the waiting period is over, the gauge mode can be switched off manually

->33.

The no-ﬂy time after diving in gauge mode is 48 hours.

Desaturation time will not be displayed.

SCUBAPRO ALADIN 2G

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5. Apnea mode

5. APNEA MODE

5.1 Switching the Apnea mode on and off

Apnea mode can be switched on and off like Gauge mode, when there is no desaturation and no apnea dives have been made in the last 48 hours.

WARNING

Apnea diving after SCUBA diving is not recommended. Check the latest recommendation from your Instructor or Diving organization.

WARNING

Aladin 2G doesn’t track nitrogen intake to your body at Apnea mode. Therefore no ﬂy time after Apnea diving is set to 48 hours. Also SCUBA diving after Apnea is recommended only after sufﬁcient surface time. Check the latest recommendation from your Instructor or Diving organization.

Procedure:

1. From the time of the day display push

or until ALGO is displayed.

2. Conﬁrm with

activate or deactivate the Apnea mode. “deco”, “gauge” or “apnea” starts ﬂashing.

3. By pushing

and select the apnea mode.

4. Conﬁrm your setting with .

that you wish to

scroll between modes

WARNING

SCUBAPRO highly recommends professional training in apnea or free diving techniques and physiology before conducting breath hold dives. No dive computer can replace the need for proper dive training. Insufﬁcient or improper training may cause a diver to commit errors that can lead to serious injury or death.

WARNING

Deep repetitive Apnea dives are not recommended; leave enough recovery time between your Apnea dives.

WARNING

All breath hold dives include a risk of shallow water blackout, that is, a sudden loss of consciousness due to oxygen starvation.

Apnea diving is the most natural form of diving, known also as Free diving or Breath hold diving. Due to speciﬁc demands on Apnea diving, Aladin 2G has now this mode integrated. Apnea mode is comparable to Gauge mode, it doesn’t have a dive algorithm and all decisions are left to the diver. Therefore SCUBAPRO recommends:

1. Never apnea dive alone.

2. Make only apnea dives which your education and physical condition allow.

In apnea diving fast descents and ascents are allowed. Therefore Aladin 2G uses faster sampling of the depth for higher accuracy. Aladin 2G updates display and maximum depth every 15 seconds, logbook is updated every second.

English

SCUBAPRO ALADIN 2G

Page 38

5. Apnea mode

5.2 Diving in Apnea mode

The following information is displayed in Apnea mode:

In Apnea mode the dive can be started manually by pressing . This function allows fast sampling to start straight from the surface. Automatic start of the apnea dive will happen from depth of 0.8m/3ft. Once activated the Apnea mode will run 15 minutes after surfacing. This allows you to start a repetitive apnea dive with precise data in the logbook. Surface mode can be stopped with long press

Aladin 2G Apnea mode has special alarms and functions tailored to Apnea diving and Apnea training. You can select multiple alarm functions at the same time. The alarm functions setup is explained in page ->66.

SCUBAPRO ALADIN 2G

Page 39

6. Diving with microbubble (MB) levels

6. DIVING WITH MICROBUBBLE (MB) LEVELS

NOTE:

)

The following chapter deals with

the characteristics of diving with microbubble (MB) levels. For general information about displays and features of diving with Aladin 2G see chapter 3.

Microbubbles are tiny bubbles that can build up inside a diver’s body during any dive and normally dissipate naturally during an ascent and on the surface after a dive. Dives within no-stop time and observance of decompression stops do not prevent the formation of microbubbles in the venous blood circulation. Dangerous microbubbles are those migrating into the arterial circulation. The reasons for the migration from the venous blood circulation to the arterial circulation can be a great many microbubbles collecting in the lungs. SCUBAPRO has equipped Aladin 2G dive computers with a new technology to protect from microbubbles. The diver chooses – according to his/her needs – an MB level and inﬂuences through it the level of protection from microbubbles. Diving with MB levels requires additional ascent stops (level stops), the ascent is slowed down and the body gets more time to desaturate. This works contrary to the formation of the microbubbles and increases safety. Aladin 2G features 6 microbubble levels (L0-L5). Level L0 corresponds to SCUBAPRO’s well-known decompression model ZH-L8 ADT and does not require level stops due to microbubble formation. Levels L1 to L5 offer additional protection from microbubble formation with level L5 offering the highest protection. Similar to the display of information during decompression dives or dives within nostop time, Aladin 2G displays depth and duration of the ﬁrst level stop as well as the total time of ascent as soon as the MB nostop time has run out. As the MB no-stop

time is shorter than the ordinary no-stop time a diver will be required to carry out a stop (level stop) sooner than a diver using level L0. If a diver ignores a required level stop, Aladin 2G will cascade to a lower MB level and the dive can not be completed with the initially chosen MB level. E.g. if a diver sets level L4 on Aladin 2G prior to the dive and during the dive ignores the recommended stops Aladin 2G will automatically adjust the setting to level L3 or lower.

English

SCUBAPRO ALADIN 2G

Page 40

6. Diving with microbubble (MB) levels

6.1 Comparison of dives with MB level L0 and MB level L5

When two Aladin 2G are used simultaneously, one unit is set for example to MB level L5, the other to L0, the no-stop time will be shortened and level stops will be required before the diver has the obligation of a decompression stop. These additional level stops help dissipate the microbubbles.

Microbubble accumulation at the end of dive

Time

Depth

MB level

NO STOP

DECO

NO STOPNO STOP

STOP

DECO

STOP

Decompression values

Decompression obligation, ->41

Level stop values

3m/10ft

6m/20ft

9m/30ft

12m/40ft

15m/50ft

Stop depth

6.2 Terminology

This chapter will exclusively deal with terminology and display features used while diving with MB levels. All other features are described in chapter 3 (->19).

6.2.1 Display during MB no-stop phase

MB no-stop time

Remaining time at a respective depth allowing ascent without level stop.

DEPTH

DIVE TIME

NO STOP

CNS O2%

2 x

MB level

activated Level L2 is active

Nitrogen loading bar

relative to LO

->27

->26

35.7m

MB no-stop phase

Dive phase during which surfacing is possible without MB level stop.

Time

Depth

16min Dive time MB no-stop time

Max depth

9min

Current depth

Level stop phase

SCUBAPRO ALADIN 2G

Page 41

6. Diving with microbubble (MB) levels

(Max depth >) Temperature

> No-stop time relative to L0 > Temperature and time of day > (Max depth)…

)

Whereas the quantitative information relative to L0 can be seen by pressing the right

6.2.2 Display during level stop phase

> MB level active

NOTE:

button, qualitative information is always visible on the display in form of the nitrogen loading bar. In particular, when the L0 no-stop time is less than three minutes, the nitrogen bar will ﬂash ->27. This will help you avoid entering inadvertently into decompression.

English

Total ascent time

including level stops

STOP

Level stop depth

The deepest level stop is displayed.

Level stop duration

The duration of a level stop at a given level stop depth is displayed.

DEPTH

S L O W

DIVE TIME

CNS O2%

Nitrogen loading bar

relative to LO

->27

->26

Time

Depth

35.7m MB no-stop phase

Total ascent time (14min)

9m/30ft

Level stop phase

To complete the dive without cascading to a lower MB level all requested level stops must be observed.

(Max depth >) Temperature

> MB level active

> No-stop time or deco information relative to L0

> Temperature and time of day

> (Max depth)…

6.3 Preparation for a dive with MB levels

6.3.1 Setting the MB level

To change the MB level Aladin 2G must be in user mode (time of day display).

or until

1. Push or until the symbol for MB levels

appears.

2. Conﬁrm that you wish to change the displayed MB level by pushing .

3. Change MB level by pushing or

Conﬁrm the selected MB level with .

Without conﬁrmation the display will disappear after 3 minutes and your entries will not be accepted.

Aladin 2G will display the conﬁrm that an MB level beyond L0 (L1L5) has been chosen. During the dive the

6m/20ft

3m/10ft

Lowest level stop depth

3min Level stop duration

symbol to

SCUBAPRO ALADIN 2G

Page 42

6. Diving with microbubble (MB) levels

MB level is shown by pressing 2x . If however a level stop is ignored, the new MB level is shown (->41).

NOTE:

)

MB levels have an inﬂuence on the

dive planner.

6.4 Functions during the dive with MB levels

6.4.1 Level stop information

MB no-stop time

While diving with MB levels L1 to L5 Aladin 2G will display the MB no-stop time instead of the ordinary no-stop time. Within the MB no-stop time no level stops are required. “NO STOP” and the MB level symbol are visible. The remaining MB no-stop time is shown in minutes.

DEPTH

MB no-stop time

NOTE:

)

• Information and alarms for MB no-stop time and ordinary no-stop time are the same (->27).

• No-stop time relative to L0 is shown by pressing 3x

(see )

• Regardless of the MB level, we generally recommend to perform a slow ascent during the last few metres / feet.

DIVE TIME

NO STOP

Nitrogen loading bar

relative to L0

Level stop

Level stop icon

DEPTH

STOP

Level stop

duration

DIVE TIME

CNS O2%

Deepest level stop depth

On entering the level stop phase, “NO STOP” disappears and the arrow appears. The seconds and an audible attention beep goes off. To complete the dive without

STOP

arrow ﬂashes for 8

cascading to a lower MB level, all requested level stops must be observed. The deepest level stop is displayed in metres (feet). The display “2: 3m ” (“2: 10ft”) means that a level stop of 2 minutes at a depth of 3 metres (10 feet) has to be observed. Deco information relative to L0 is shown on an alternate display (see When a level stop has been ﬁnished, the next higher level stop – if present – is displayed. When all level stops have been observed, the arrow

STOP

extinguishes and “NO STOP” reappears. The indication of time shows the MB no-stop time again.

DEPTH

STOP

Level stop ignored

DIVE TIME

CNS O2%

Total time of ascent

STOP

SCUBAPRO ALADIN 2G

Page 43

6. Diving with microbubble (MB) levels

WARNING

The attention message “Level stop ignored” is activated if the requested level stop is not observed. An attention beep* goes off and the

STOP

arrow

, the depth and duration of the ignored level stop begin ﬂashing. To complete the dive without being reduced to a lower MB level, you must descend to the prescribed depth immediately!

MB level reduced

DEPTH

STOP

New MB level

DIVE TIME

CNS O2%

WARNING

The warning “MB level reduced” is activated if the diver ascends more than 1.5m (5ft) above the required level stop. Aladin 2G reduces the MB level, an attention beep* goes off and the new MB level is shown in the lower left corner. To complete the dive without being further reduced to an even lower MB level the new level stop must be observed.

6.4.2 Total time of ascent

DEPTH

STOP

DIVE TIME

CNS O2%

Total ascent time

Aladin 2G displays the level stop information and the total time of ascent. This includes the time of ascent as well as all level stops.

NOTE:

)

The total time of ascent is calculated

on the basis of the prescribed

ascent rate. Total time of ascent can be subject to change if the ascent rate is not ideal (100%)

6.4.3 Decompression obligation

Aladin 2G calculates and displays level stops to reduce microbubble formation, but it also calculates the diver’s decompression data.

WARNING

Avoid decompression dives when diving with MB levels.

English

NOTE:

)

* Attention beeps can be suppressed

with “set 1” (->61) or via SmartTRAK.

SCUBAPRO ALADIN 2G

DEPTH

DECO

STOP

DIVE TIME

CNS O2%

How to avoid decompression stops:

• Check ordinary no-stop time by pushing until L0 appears.

Page 44

6. Diving with microbubble (MB) levels

• Observe the nitrogen loading bar (it is relative to L0) ->27, ->38, ->39.

• If the nitrogen loading bar flashes (less than 3 minutes to deco): ascend slowly a few metres/feet.

WARNING

At the beginning of a decompression phase an attention beep goes off and the ﬂashes for 8 seconds. In order to prevent a dive with long decompression stops it is recommended that you ascend a few metres/feet on seeing this message.

Decompression obligation

DECO

STOP

Level stop information

If decompression stops become obligatory,

DECO

the

symbol will be displayed. The total ascent time will now also contain a decompression stop.

DECO

CNS O2%

symbol

6.4.4 Level stop and deco stop

When the level stop depth equals the depth of the ﬁrst obligatory decompression stop and if you are within 1.5m /5ft of the stop depth itself, Aladin 2G shows

STOP

(level stop). The indicated duration

DECO

STOP

and

refers to level stop duration.

Since level stops are more restrictive than decompression stops, when all decompression obligations have been observed the display changes from

STOP

only.

DECO

STOP

Time

Depth

DECO

STOP

MB level

DECO

STOP

Level stop duration

3m/10ft

Deco stop duration

Level stop duration

NO STOP

STOP

Decompression stop depth = level stop depth

NO STOP

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Page 45

6.5 Complete a dive with MB

S L O

levels

A dive with MB levels is completed the same way as a dive without MB levels (L0) (->29), save for the following exceptions:

If the MB level has been reduced during the dive, Aladin 2G will display a ﬂashing MB level symbol and the current MB level for ﬁve minutes after reaching the surface. The dive is then completed and Aladin 2G changes to user mode with the MB level switching back to the original MB setting.

Repetitive dives and MB levels: If during a dive a level stop is being ignored and the diver starts another descent shortly afterwards, Aladin 2G might immediately request level stops. To complete the dive with the initially set MB level all level stops must be observed.

6. Diving with microbubble (MB) levels

English

SCUBAPRO ALADIN 2G

Page 46

7. PDIS (Proﬁle Dependent Intermediate Stop)

7. PDIS (PROFILE

DEPENDENT INTERMEDIATE STOP)

7.1 Introduction to PDIS

(Proﬁle-Dependent Intermediate Stop)

The main purpose of a dive computer is to track your nitrogen uptake and recommend a safe ascent procedure. Diving within the so called no-stop limits means that at the end of the dive you can ascend directly to the surface, albeit at a safe ascent rate, while for dives outside of the no-stop limit (so-called decompression dives), you must perform stops at certain depths below the surface and allow time for excess nitrogen to be expelled from your body before ﬁnishing the dive.

In both cases, it can be beneﬁcial to stop for a few minutes at an intermediate depth between the maximum attained depth during the dive and the surface or, in case of a decompression dive, the ﬁrst (deepest) decompression stop.

An intermediate stop of this kind is beneﬁcial as soon as the ambient pressure at that depth is low enough to ensure that your body is predominantly offgassing nitrogen, even if under a very small pressure gradient. In such a situation, you can still cruise along the reef and enjoy the dive, while your body gets a chance to slowly release nitrogen.

the continuously changing situation in your body. Along the same lines, PDIS will account for the accumulated nitrogen from previous dives, hence PDIS is also repetitive-dive dependent. Conventional deep stops completely ignore these facts.

The following ﬁgure quantiﬁes the extent of PDIS and illustrates its dependence on cumulative nitrogen uptake for two sample dive proﬁles. This ﬁgure also demonstrates the conceptual difference between PDIS and the rather rudimental “deep” stops.

Speciﬁcally, the ﬁgure compares two dive proﬁles to a maximum depth of 40m/132ft but otherwise very different. Proﬁle 1 stays at 40m/132ft for 7 minutes, then ascends to 30m/100ft for 3 minutes, followed by 12 minutes at 20m/65ft. Proﬁle 2 stays less than two minutes at 40m/132ft, then ascends to 21m/69ft and stays there for 33 minutes. Both dive proﬁles are no-stop dives to the limit of entering decompression. The solid line with triangles represents the PDIS depth as displayed on the computer screen during the course of the dive for proﬁle 1, the dotted line with triangles represents the PDIS depth as displayed on the computer screen during the course of proﬁle 2. One can see that the displayed PDIS depth increases as more nitrogen is accumulated in the body, but does so very differently in the two dives due to the different exposure in the two proﬁles. The PDI stop is carried out at 25 minutes for proﬁle 1 and at 37 minutes for proﬁle 2, followed by the safety stop at 5m/15ft.

In recent times, so called “deep” stops have been introduced in some dive computers and tables, deﬁned as half the distance from the maximum reached depth and the surface (or the lowest decompression stop). Spending 2 or 15 minutes at 30m/100ft would result in the same deep stop of 15m/50ft. With PDIS, as the name suggests, Aladin 2G interprets your dive proﬁle and suggests an intermediate stop that is a function of your nitrogen uptake so far. The PDI stop will therefore change through the course of the dive to reﬂect

The solid line with open circles on the other hand represents the depth that would be displayed by a computer following the conventional deep stop method, and it would be the same for the two dive proﬁles. Deep stops completely ignore any facts about the dives themselves aside for the max depth.

SCUBAPRO ALADIN 2G

Page 47

7. PDIS (Proﬁle Dependent Intermediate Stop)

English

7.2 How does PDIS work?

The mathematical decompression model in Aladin 2G, called ZH-L8 ADT MB PMG, tracks your decompression status by dividing your body into 8 socalled compartments and mathematically following the uptake and release of nitrogen in each with the appropriate laws of physics. The various compartments simulate parts of your body such as central nervous system, muscles, bones, skin and so on.

The depth of the PDI stop is calculated as that at which the leading compartment for the decompression calculation switches from ongassing to offgassing, and the diver is advised to perform a 2-minute stop above the displayed depth (this is the opposite of a decompression stop, where you are asked to remain just beneath the displayed depth). During this intermediate stop, the body is not taking up any more nitrogen in the leading compartment, but rather releasing nitrogen (though under a very small pressure gradient). This,

SCUBAPRO ALADIN 2G

combined with the relatively high ambient pressure, inhibits bubble growth.

It should be noted that the two fastest compartments, with 5 and 10 minutes half times respectively, are not considered for the determination of the PDI stop depth. This is due to the fact that these compartments are only “leading” for very short dives, for which an intermediate stop is not required at all.

NOTE:

)

The PDI stop is not a mandatory

stop and it is NOT a substitute for the

3-5 minute safety stop at 5m/15ft.

WARNING

Even when performing a PDI stop, you still MUST perform a safety stop at 5m/15ft for 3 to 5 minutes. Performing a 3 to 5 minute stop at 5m/15ft at the end of any dive is still the best thing you can do for yourself!

Page 48

7. PDIS (Proﬁle Dependent Intermediate Stop)

7.3 Special considerations

when diving with more than one gas mixture (Aladin 2G)

Switching to a higher oxygen concentration mix during the dive inﬂuences the PDI stop. This needs to be accounted for, in line with the predictive nature of multigas handling in ZH-L8 ADT MB PMG.

When diving with more than one gas mixture, Aladin 2G displays the PDIS depth according to the following rules:

• if the PDI stop calculated for the bottom

mix (gas 1) is deeper than the switch depth, than this calculated value is displayed;

• if the PDI stop calculated for gas 1

is shallower than the switch depth to gasd, then the displayed PDI stop is a function of gasd.

In case of a missed gas switch, Aladin 2G reverts to the PDI stop for the actively breathed mix.

7.4 Diving with PDIS

NOTE:

)

To use the PDIS feature, you must set

PDIS to ON in the PDIS menu under Set 1. The default setting is OFF.

and updates the PDIS depth accordingly to reﬂect the optimum at all times.

The PDIS depth is shown in the lower left corner, with the label PDIS. During a nostop dive, as soon as you reach that depth during an ascent, a 2-minute countdown will appear in place of the no-stop value with label STOP. In addition, the PDIS label will blink. You can have one of three situations:

•

you have spent 2 minutes within 3m/10ft above the indicated depth. The countdown timer disappears and the

PDIS value is replaced by the label YES as an indication that you have

performed the PDI stop;

• you have descended by more than 0.5m/2ft below the PDIS. The countdown timer disappears and will reappear again, starting at 2 minutes, the next time you ascend to the PDIS depth;

• you have ascended by more than 3m/10ft above the PDIS. The PDIS value and countdown timer are replaced by the label NO to indicate the fact that you have not performed the PDI stop.

If Aladin 2G is displaying a decompression obligation when you reach the PDIS depth during an ascent, all rules apply the same way, but the 2-minute countdown runs in the background and is not displayed on the screen. The PDIS label however will still be blinking to show you that you are in the PDIS range.

When the calculated PDI stop is deeper than 8m/25ft, Aladin 2G shows it on the display and continues to do so until you reach the displayed depth during an ascent. The displayed value changes during the dive as Aladin 2G tracks the uptake of nitrogen in the 8 compartments

SCUBAPRO ALADIN 2G

Page 49

7. PDIS (Proﬁle Dependent Intermediate Stop)

NOTE:

)

Aladin 2G issues no warnings relating

to a missed PDI stop.

When diving with MB levels, PDIS follows the same rules as described above. MB levels, however, introduce stops earlier and deeper than the L0 base algorithm. As such, the PDIS display may be delayed and for certain dives it may not be displayed at all. This for instance would be the case for a shallow dive with air (21% oxygen) and MB level L5.

English

SCUBAPRO ALADIN 2G

Page 50

8. Diving with two gas mixtures

8. DIVING WITH TWO GAS MIXTURES

Time

Depth

1 d

Bottom mix (gas 1)

NOTE:

)

The following chapter deals with the

characteristics of diving with two gases.

Aladin 2G enables you to use two different Nitrox mixtures during the same dive. Tank 1 contains the bottom mix (gas 1) and tank d contains the deco mix (gas d).

Switching the deco gas option on and off

In order to enable two-gas diving you must turn on the deco gas option in the SET 1 menu ->60.

Setting the gas mixture and the depth for changing the gas mixture

O2 fraction

Deco mix (gas d)

During dives with two gas mixtures the bottom mix (gas 1) contains the lower fraction of oxygen. Aladin 2G will only accept settings corresponding with this order.

Switching depth (MOD gas d)

WARNING

For gas mixtures having an oxygen percentage of 80% or greater the ppO2 is ﬁxed at 1.6bar and cannot be altered in any way.

Range of O

fraction

100%

21%

Depth for change of gas mixture, MOD

Procedure:

1. Enter the setting for the fraction of oxy-

gen and the ppO

ppO2 max

max (MOD) for gas 1

SCUBAPRO ALADIN 2G

Page 51

8. Diving with two gas mixtures

(bottom mix) according to the instructions on page 21 (points 1-6).

2. Repeat the process in the Gas d O

menu to set the oxygen fraction and ppO

max for gas d. Note that in this

case the resulting MOD corresponds to the depth at which you plan to switch from gas 1 to gas d during the ascent phase (switch depth).

3. If you set gas d to “– – O

%”, Aladin 2G

will compute the dive considering gas 1 only.

Aladin 2G will only accept a gas switch depth (MOD gas d) as input where the maximum partial pressure of oxygen

max), as pre-set manually (->21 point

(ppO

5) or by means of SmartTRAK, is not exceeded.

NOTE:

)

• During the ascent an audible and visual attention message will indicate that you have reached the depth which requires the change to gas d

->52.

• Without confirmation with the display will disappear after 3 minutes and your entries will not be accepted.

• If the deco gas option is turned on and the oxygen fraction of gas d is set to a value other than “--O

%”, in

surface mode and up to a depth of

0.8m Aladin 2G will display “2G” in the lower right corner of the display instead of a percentage value.

NOTE:

)

• The time to reset the O

% mix to air

can be set with SmartTRAK between 1 hour and 48 hours or to “no reset” (default).

After the reset, the oxygen fraction of

gas 1 is set to 21% and gas d is set to “– – O

%” (single gas dive).

Switching between single-gas and two-gas diving

If gas d is not going to be used during the next dive you can either set it to “– – O (->48, point 2) or you can turn off the deco

%”

gas option in SET 1. When you turn off the deco gas option in SET 1, the setting in the Gas d O

menu remains but Aladin 2G

calculates the dive using gas 1 only. If the deco gas option is turned off, the GAS d O

menu will display OFF in the

lower left corner (instead of an MOD) and the ppO2 setting will not appear.

Functions during a dive with two gas mixtures

WARNING

Diving with more than one gas mixture represents a much higher risk than diving with a single mixture, and mistakes by the diver may lead to serious injury or death. During dives with several gas mixtures, always make sure you are breathing from the tank you intended to breath from. Mark all your tanks and regulators, so they can under no circumstances be mixed up! Before every dive and after changing a tank, make sure that each gas mixture is set to the correct value for the corresponding tank.

Predictive decompression prognosis

The calculation of decompression data is based on the assumption that the change of gas mixture will be performed at the previously selected switch depth (MOD gas d). If a diver ignores the required change or changes the mixture belatedly, Aladin 2G will readjust the decompression calculation accordingly. In case of an ignored switch the dive computer will then base its calculations on the assumption that the diver will ascend to the surface with gas 1.

Alternate displays during a dive

with two gases

NOTE:

)

All displays time out after 5 seconds

and the default display is shown again. (Only exception is the temperature, screen 2 below.)

English

SCUBAPRO ALADIN 2G

Page 52

8. Diving with two gas mixtures

The default display shows the pre-

dictive decompression prognosis, which assumes the diver will switch to the deco gas at the specified switch depth. In the bottom left corner the temperature is displayed unless the current depth is 1m/3ft shallower than the max depth, in which case the max depth is displayed.

Upon pressing the right button, the

temperature and the current O shown in the lower row. O2% will time out after 5 sec while the temperature remains.

Upon pressing the right button,

“GAS 1” or “GAS d” appears in the middle row to indicate the currently active gas and the MOD appears in the bottom left corner. “GAS 1” or “GAS d” will time out after 5 seconds unless the right button is pressed again.

In case that gas 1 is the active gas,

pressing the right button one more time shows O tom right corner and the decompres-

% of gas 1 in the bot-

sion information in case the deco gas is not used (decompression information relative to gas 1 only). This is the calculation that Aladin 2G would switch to in case, having reached the switch depth, the diver did not confirm the switch. The decompression information and the O

If an MB level greater than L0 is active,

% blink.

pressing the right button one more time shows the predictive decompression information and in the bottom left corner the currently active MB level.

Pressing the right button again shows

the predictive decompression information relative to L0 together with the L0 symbol at the bottom left.

One more right button push shows

the decompression information relative to L0 if only gas 1 is used, with the decompression information and the O

% of gas 1 blinking.

Upon pressing the right button again,

the time of day appears in the middle row.

% are

SCUBAPRO ALADIN 2G

Page 53

Gas 1 active, MB level L0

8. Diving with two gas mixtures

1 3 84

DEPTH

DIVE TIME

DECO

STOP

CS O

Max

depth

CNS O

Predictive decompression

information

Temperature

DEPTH

DIVE TIME

DECO

STOP

mix of the

currently active

tank

DEPTH

MOD gas 1

DIVE TIME

Decompression information assuming that you finish the dive with gas 1

Gas d active, MB level L0

DEPTH

DIVE TIME

DECO

STOP

CS O

Max depth

Predictive decompression

CNS O

information

DEPTH

DIVE TIME

DECO

STOP

Temperature

O2 mix of

the currently

active tank

3 8

DEPTH

DIVE TIME

MOD gas d

Gas 1 active, MB level L1-L5

DEPTH

DIVE TIME

DECO

STOP

CS O

Max depth

CNS O2%

Predictive decompression information relative to active MB level

DEPTH

DIVE TIME

DECO

STOP

Temperature

O2 mix of the currently active tank

3 4

DEPTH

DIVE TIME

MOD gas 1

DEPTH

DIVE TIME

DECO

STOP

DEPTH

DIVE TIME

Time

DEPTH

DIVE TIME

DECO

STOP

Decompression information assuming that you finish the dive with

gas 1

O2 mix gas 1

DEPTH

Time

DIVE TIME

English

DECO

STOP

Active MB level

decompression

information relative

to active MB level

Gas d active, MB level L1-L5

DEPTH

DECO

STOP

Max depth Predictive

decompression information relative

to active MB level

SCUBAPRO ALADIN 2G

DEPTH

DIVE TIME

Predictive

DIVE TIME

CS O

CNS O2%

DEPTH

DECO

STOP

Temperature

DEPTH

DIVE TIME

DECO

STOP

L O W

Predictive decompression information

relative to L0

3 5 6 82

DEPTH

DIVE TIME

MOD gas d

mix of the

currently active

tank

7 8

DEPTH

DECO

STOP

Decompression information L0, assuming that you

finish the dive with gas 1

DEPTH

DIVE TIME

DECO

STOP

Active MB level

Predictive

decompression

information relative

to active MB level

DIVE TIME

relative to

DECO

DEPTH

Time

DEPTH

DIVE TIME

STOP

S L O W

Predictive decompression information relative to L0

DIVE TIME

DEPTH

DIVE TIME

Time

Page 54

8. Diving with two gas mixtures

Changing the gas mixture

Switch depth

DEPTH

MOD gas d

DIVE TIME

S L O

Switch to gas d

After immersion, Aladin 2G automatically selects gas 1.

WARNING

When during an ascent the switch depth is reached (MOD gas d), an audible warning goes off and “GAS d”, its MOD and O 30 seconds.

Procedure:

1. Switch to the regulator with gas d and start breathing.

2. Conﬁrm the change by pressing within 30 seconds. “GAS d” and the oxygen fraction of gas d is displayed for 5 seconds without blinking.

To interrupt the switch process at any point, press

DEPTH

Change to gas d conﬁrmed

S L O

DIVE TIME

% blink for

No change of gas mixture:

If a diver fails to conﬁrm the change of gas mixture or interrupts the switching procedure by pressing

, Aladin 2G displays “GAS 1”, the MOD and the oxygen fraction for 5 seconds. Aladin 2G continues to calculate with gas 1 only and adapts the decompression calculation accordingly.

NOTE:

)

If after the decompression calculation

has readjusted itself to reﬂect the failed switch the diver goes again below the switch depth (MOD of gas d), Aladin 2G will revert to the decompression calculation that considers gas d also, since upon ascending again the diver will have a renewed opportunity to perform the switch once the switch depth is reached.

DEPTH

Failed or interrupted switch

MOD gas 1

L O W

DIVE TIME

Belated change of gas mixture:

A diver can catch up on a required change to gas d until he reaches the surface.

1. Initiate the switching process by pressing

. Aladin 2G displays “GAS d”, MOD and the oxygen fraction of gas d blinking for 30 seconds.

2. Switch to the regulator with the deco gas mixture and start breathing.

3. Conﬁrm the change by pressing . “GAS d” and the oxygen fraction of the deco gas is displayed for 5 seconds without blinking. The decompression calculation will readjust accordingly. (Press

to interrupt the switch

process at any time.)

SCUBAPRO ALADIN 2G

Page 55

Submerging again after a change to gas d:

If after a change to gas d the Maximum Operating Depth (MOD) of gas d is exceeded, the ppO2 max warning will appear ->25. Change back to gas 1, which is suited for this depth, or rise to the Maximum Operating Depth of gas d. Failure to do so can result in oxygen poisoning.

1. Initiate the switching process by pressing MOD and the oxygen fraction of gas 1 for 30 seconds.

2. Switch to the regulator with gas 1 and start breathing.

3. Conﬁrm the change by pressing “GAS 1” and the oxygen fraction of gas 1 is displayed for 5 seconds without blinking. Afterwards the decompression calculation will readjust accordingly.

. Aladin 2G displays “GAS 1”,

8. Diving with two gas mixtures

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Page 56

9. Dive planner

9. DIVE PLANNER

Aladin 2G has a dive planner which allows the planning of no-stop dives and decompression dives. Basis of the planning:

• selected fraction of oxygen and MOD

• selected water type

• selected MB level

• water temperature of the most recent dive

• altitude range (if any)

• status of saturation at the time the dive planner is selected

Select dive planner

until PLn

Enter the dive planner

if rep. dive

Dive planner symbol

The no-dive warning and its duration are displayed

if Aladin 2G detects an increased risk due to the accumulation of microbubbles.

CNS O2%

• assuming a normal workload of the diver and observance of the prescribed ascent rates

assumption: the change to gas d

• is performed at the selected MOD of gasd.

9.1 Planning a no-stop dive

To select the dive planner Aladin 2G must be in user mode (time of day display). Push or until the symbol for the dive planner PLn appears. (The dive planner cannot be selected in gauge mode.)

No-dive warning (Do Not Dive)

Duration of the warning

Input of the surface interval by pushing /

No-stop time or MB no-stop time

DEPTH

DIVE TIME

NO STOP

CNS O2%

Set desired depth ( and )

Icon for MB level L1-L5

Enter the dive planner with

The input window for the time interval is displayed if there was a remaining desaturation (DESAT) before the dive planner has been selected. This surface interval between now and the beginning of the dive can be changed with

and in steps of 15 minutes. Aladin 2G displays the CNS O2% value and the altitude section to which you may not rise at the end of the selected surface interval.

If the no-dive warning and its duration has been

displayed, Aladin 2G proposes this time – rounded up to the next 15 minutes – as surface interval. If the proposed interval is shortened, the no-dive warning appears.

SCUBAPRO ALADIN 2G

Page 57

9. Dive planner

Conﬁrm the displayed interval with (if applicable). With

and set the depth for

which you want to know the no-stop time.

If an MB level has been selected (L1-

L5), the MB no-stop time is shown.

Depths deeper than the MOD for the selected gas (O

mix) are not displayed.

If the deco gas option is turned on,

only the depth between the MOD of gas 1 and the MOD of gas d are displayed.

On page 30 you will find further

information and safety considerations regarding the no-dive warning.

9.2 Planning a decompression dive

DEPTH

DIVE TIME

NO STOP

CNS O2%

DEPTH

DECO

STOP

Set desired bottom time with

DIVE TIME

CNS O2%

and

3. “Add” asks that you set the bottom time. This is done with and . Aladin 2G calculates the decompression information for this set bottom time. If an MB level (L1-5) is selected, Aladin 2G calculates the level stop data.

CNS O

% values higher than 199% will be

displayed as 199 %. Ascent time greater than 99 minutes is displayed as “ – – ” Deco stop depth deeper than 27m (90ft) is displayed as “ – – : – – ” CNS O CNS O

equal or greater than 75%:

% symbol starts ﬂashing

CNS O2 equal or greater than 100%: CNS O2% symbol and CNS O2% value are ﬂashing. MB level stop deeper than 27m (90ft): MB level will be reduced.

English

Conﬁrm the desired depth with

1. Activate the dive planner for a no-stop dive ->54.

2. Set the desired depth with and

planning by pushing . Aladin 2G shows the bottom time (no-stop time + 1 minute) and the appropriate decompression information or level stop data respectively.

SCUBAPRO ALADIN 2G

9.3 Leaving the dive planner

By pushing once or twice you can exit the dive planner. This also occurs after three minutes without operation.

, then switch into decompression

Page 58

10. Logbook

10. LOGBOOK

10.1 Survey

A dive is entered in the logbook if the dive time is longer than 2 minutes. Aladin 2G records the proﬁles of about 25 hours of diving. In Apnea mode all dives are entered in the logbook without time limit and at least 6h of Apnea proﬁles will be stored. This information can be transferred to a PC with the standard infrared interface (IrDA) and the Windows All dives in the memory can be displayed directly on the dive computer.

10.2 Operation

From the time of day display you can select the logbook with .

software SmartTRAK.

until



Surface interval

DIVE TIME

performance

mix

Dive time

Battery

Logbook icon

Max depth

DEPTH

Dive number

Date of the dive

L O W

From here you can:

a) get more information about the

displayed dive by pushing (see below, “page 2”). Aladin 2G displays further information about the selected

dive. b) select other dives. Each time you push

or causes a jump to the next or previous dive.

At the end of the logbook Aladin 2G displays statistic information ->57.

Page 2

Altitude range (if >0)

Repetitive dive number

If there was a remaining desaturation time (DESAT) before selecting the logbook, the time since the last dive (surface interval) is displayed.

Page 1

With

you enter the logbook. The most recent dive is displayed (dive number 1). There are 3 pages for each dive.

CNS O2%

Minimum temperature

CNS value at the end of the dive

Starting time

Push to get more information about the dive.

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Page 59

10. Logbook

Page 3

If a dive is started within adaptation time (after a change of altitude), the adaptation time is displayed instead of the surface interval.

Duration of surface

SOS if applicable

MB level (at the beginning of the dive)

interval (only with

repetitive dives)

O2 mix deco gas (if a switch has taken place during the dive)

Further possible information about the dive:

S L

Too fast ascent* (page 1)

O W

DECO

Ignored decompression stop*

STOP

(page 1)

Ignored decompression stop* (page 3)

Diving in SOS mode (gauge mode) (page 3)

Altitude range (page 2)

MB level dive (L1-L5) (page 3)

STOP

Ignored MB level stop* (page 1)

Desaturation was reset before

DESAT

the dive (in “set 1”) (page 1, 2)

Desaturation was reset before the dive by removing the battery

DESAT

(page 1, 2)

Battery quality factor has been 3 bars or less during the dive (page 1, 2, 3)

Diving in gauge (page 1, 2, 3)

Average depth (gauge mode)

AVG

(page 3)

No-dive warning after the dive (page 1)

Apnea mode dive (page 35)

*Alarms during the dive

gets you back to the dive list (ﬁrst level screen within logbook). From here you can advance to the next dive of interest and press to retrieve more information about that dive etc.

Statistic information

From the time of day display you can get the following statistic information over all dives. Push

Deepest dive

, and :

Longest dive

DEPTH

Cumulative bottom time

Number of dives

S L O W

DIVE TIME

Leaving the logbook

By pushing once or twice you can exit the logbook. The logbook closes automatically after 3 minutes without operation.

English

SCUBAPRO ALADIN 2G

Page 60

11. Settings

11. SETTINGS

Adjust the altitude indication to your current altitude.

1. Starting from the time of day display

11.1 Altitude adjustment

The altitude adjustment does not affect altitude ranges nor any calculations.

push or until the mountain symbol and the altitude appear.

2. Conﬁrm that you wish to change the displayed altitude by pushing

The altitude starts to ﬂash.

3. Change the altitude in increments of 10m / 50ft by pushing

or .

4. Conﬁrm the selected altitude with

11.2 Menu “set 1”

With menu “set 1” or SmartTRAK you can conﬁgure the following items (dive functions):

Setting Range Default Page

•

Depth alarm 5 - 100m (20 - 330ft) on/off 40m (130ft),off 58

•

Dive time alarm 5-195min, on/off 40m (130ft),off 59

•

Safety stop duration 1-5min 3 minutes 59

•

Maximum partial pressure of oxygen (ppO

•

Time limit to reset the O to air

•

Deco gas on/off off 60

•

PDIS (Profile Dependent Intermediate Stop)

•

Unit system metric/imperial 60

•

Water type on (salt water)/off (fresh

•

Backlight illumination duration 2-12s ; push on / push off 6s 61

•

Audible attention signals on / off (SmartTRAK:

•

Water contacts on / off on 61

•

Reset desaturation on / off no reset 62

max) 1.2-1.6bar 1.4bar 59

% mix

no reset / 1 - 48hrs no reset 59

on/off off 60

on (salt water) 60

water)

on 61

selective)

Starting from the time of day display push

or until “set 1” appears.

Conﬁrm that you wish to enter into the menu of “set 1” by pushing

Once entered into the menu you can scroll with

and through the menu.

Setting the depth alarm

DEPTH

Status

DIVE TIME

Alarm depth

SCUBAPRO ALADIN 2G

Page 61

11. Settings

1. Conﬁrm that you wish to change the depth of the alarm or to switch it on or off by pushing

. The depth starts

to ﬂash.

2. Change the depth in increments of 1 m/5 ft by pushing

or .

3. Conﬁrm the selected depth with . “On” or “Off” starts to ﬂash.

4. “On” indicates “activated”, “Off” indicates “deactivated”.

switches between “On” and “Off”.

Conﬁrm the selected status with

Scubapro Aladin 2G User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual